The world's most high-profile climate change sceptic is to declare that global warming is "undoubtedly one of the chief concerns facing the world today" and "a challenge humanity must confront", in an apparent U-turn that will give a huge boost to the embattled environmental lobby.

Bjørn Lomborg, the self-styled "sceptical environmentalist" once compared to Adolf Hitler by the UN's climate chief, is famous for attacking climate scientists, campaigners, the media and others for exaggerating the rate of global warming and its effects on humans, and the costly waste of policies to stop the problem.

But in a new book to be published next month, Lomborg will call for tens of billions of dollars a year to be invested in tackling climate change. "Investing $100bn annually would mean that we could essentially resolve the climate change problem by the end of this century," the book concludes.

If you have kids, you're going to love the Squishy Circuits Project: it involves cooking and electronics, although not at the same time.

Squishy Circuits is a great sets of recipes from Samuel Johnson and Dr. AnnMarie Thomas at the University of St. Thomas, Minnesota. Essentially you will make two batches of Play-Doh, one conductive and one non-conductive, and preferably different colors. The dough can then be formed into any kind of circuit and, with the addition of some wires poking into the dough and some batteries, motors and light-bulbs, you can have yourself some sticky, squishy, educational fun.

India's supreme court has reopened the Bhopal toxic gas leak case in response to a government petition seeking harsher punishment for officials from Union Carbide, the chemical company responsible.

In a decision that delighted the long-running campaign for justice by the survivors of the 1984 gas disaster, India's highest court today agreed to review its earlier decision that reduced the crime from one of "culpable homicide" to "a rash and negligent act".

Because of the lighter charges, seven Union Carbide officials received just two-year prison sentences when the court case finally concluded in June this year - 25 years after the accident, which the government says killed around 3,500 people. Activists say at least 22,000 died in the immediate aftermath and the following years

In 8 May 1980, the World Health Organisation declared that "the world and its peoples have won freedom from smallpox." Through decades of intense vaccination, this once fatal disease had been wiped out. It was a singular victory and having won it, countries around the world discontinued the vaccination programmes. After all, why protect against a disease that no longer exists (save in a few isolated stocks)?

Unfortunately, this is not a rhetorical question. The smallpox vaccine did more than protect against smallpox. It also reduced the risk of contracting a related illness called monkeypox, which produces the same combination of scabby bumps and fever. It's milder than smallpox but it's still a serious affliction. In Africa, where monkeypox originates from, it kills anywhere from 1-10% of those who are infected. And more and more people are becoming infected.

Anne Rimoin from the University of California, Los Angeles compared data on the virus in the Democratic Republic of Congo over the last three decades. She found that, during those years, monkeypox has become 20 times more common in humans. In one particular area, 72 people out of every million were infected each year between 1981 and 1986. Between 2005 and 2007, that figure rose to 1442 per million.

Exiled to the shores of the Black Sea 2,000 years ago, the Roman poet Ovid discovered the powerful winds that blew across that eastern border of the empire. To this day the wind continues to blow inland as far as Fantanele, a Romanian village located a few dozen kilometres from the coast.

"That's why we call it the Black Sea," said Constantin Stanciu, a farmer in Fantanele. "It's a rough sea and when it's angry, which is often, it blows this far inland." The wind is the only certainty in this isolated, hilly region. The land is arid and rocky, which limits the farming possibilities. And to judge by the farmers' leathery skin, the sun is as strong as the wind. The inhabitants have been resigned to the wind's onslaught for centuries, and their poverty is apparent.

Greenpeace claims to have shut down offshore drilling by a British oil company at a controversial site in the Arctic after four climbers began an occupation of the rig just after dawn.

The environment campaigners said the four protesters evaded a small flotilla of armed Danish navy and police boats which have been guarding the rigs in Baffin Bay off Greenland since the Greenpeace protest ship Esperanza arrived last week.

The rigs are operated by the Edinburgh-based oil exploration company Cairn Energy, which last week prompted world-wide alarm among environmentalists after disclosing it had found the first evidence of oil or gas deposits under the Arctic.

As anticipation grows about a possible renaissance for the nuclear power industry -- and about its potential for curbing greenhouse gas emissions -- some politicians are stepping up warnings about the high cost of such projects.

Last week, Traicho Traikov, the Bulgarian economy and energy minister, said the cost of building a second plant near the Danube River had reached 9 billion euros, or $11.4 billion, according to the original cost of the project for two reactors was expected to be just under $4 billion.

Today I bring you a story that has it all: a solar-powered, low-cost, open source cellular network that's revolutionizing coverage in underprivileged and off-grid spots. It uses VoIP yet works with existing cell phones. It has pedigreed founders. Best of all, it is part of the sex, drugs and art collectively known as Burning Man. Where do you want me to begin?

"We make GSM look like a wireless access point. We make it that simple," describes one of the project's three founders, Glenn Edens.

The technology starts with the "they-said-it-couldn't-be-done" open source software, OpenBTS. OpenBTS is built on Linux and distributed via the AGPLv3 license. When used with a software-defined radio such as the Universal Software Radio Peripheral (USRP), it presents a GSM air interface ("Um") to any standard GSM cell phone, with no modification whatsoever required of the phone. It uses open source Asterisk VoIP software as the PBX to connect calls, though it can be used with other soft switches, too.